Improvement in apparatus for molding pipe



`U'NrrED STATES VPATENT OEEICE.

FREDERIC FULLER,v or PROVIDENCE, RHODE ISLAND.

IMPROVEMENT INPAPPARATUS FCR MoLDlNG PIPE.

Specification formingpart of Letters Patent N o.` 101,853, dated April 12, 1870.

. .To all whom it may concern: v

Be it known that I, FREDERIC FULLER, of the city and county of l?rovidence, and State o f Rhode Island, have invented anew and Improved Apparatus for use in the Manufacture' of Hollow Cast Pipes and I do hereby declare that the following specification, taken in lconnectionwith the. drawings making a part of the same, is a full, true, and exact description thereof. i

My inventionis intended to provide a convenientl apparatus especiallydesigned to be v'employed inthe manufacture of the smaller sizes of castmetal pipes.

It relates, first, to an improved molding `paratus; and, secondly, to an improved-clamp for vsecuring the molds 'in a stackvwhen' iinished, and facilitating their handling.y

The' several figures illustrating the invention will be explained in the description.

- A, Figures 2 and 3, represents a frame-work',

`which should be ofthe usual height of a moldersbench, and may be of anyconvenien-t length. It isvmade with an oifset, a a, the higher portion bein g the moldin 'g-ben ch proper. The difference in height between the bench and that portion used as a ask-rest or temporary place of deposit for the mold when iinished, as hereinafter explained, I prefer should .be at least equal to the depth of the ask-frame B, Fig. 1. To the bench, at the edge ofthe offset, is hinged a match-plate, C, and soV arranged that it 'can be laid flat upon the molding-bench, as seen at Fig. 2. Theface of the match-plate, which will be uppermost when the plateis resting on the bench, is vfurnished withl holding-clips b', ,whose shanks extend through the plate, and are provided with handles for workingthem. -rEhe object of these clips is to fasten ,the ask-frameB to the matchplate during the Amolding operation and until the mold is withdrawn from the pattern and placed face upward, j as hereinafter vto be 4explained.

D is the pattern for the pipe. tobe molded. It is furnished with extensions for core`-prints c c, and is to be properly adjusted in position across the bench, resting in curved notches cut inthe side rails of the frame. Supposin g the pattern -to have been placed on the bench, thepniateh-plate C, constructed with reference pattern.

to the pattern, as will be understood by all pattern-makers,isturneddown upon thebeneh,

as in Fig. 2, forming the temporary bottom :plate forthe ilask B, which latter is placed .over the patternaud fastened to the matchplatepby the holding-clips l). It is to be understood that in this position the plane of the upper 'face of the match-plate will coincide with a plane passing through the longitudinal taxis of the pattern and parallel with the plane of the bench.

The melder now fills the iiaskwith sand and rams it properly to take the impression of the4 This completed, the match plate, with the flask and mold, should be carefully turned over and 'rested' upon the lower .platform of the frame. The mold will then be withdrawn from the pattern, which will be left i411 its proper bearings on the bench. The clips can `now be turned so as to disconnect the match-plate from the lask,whei 1 the matchplate can be turnedback again upon the bench Fig. 3, preparatory to receiving a fresh flask for the repetition of the molding operation.

The mold E is left facev lupward upon the` frame, from which,'after being suitably prepared, it is taken to the oven for baking.'

It is evidentthat with the apparatus de-. scribed no skilled laboris required. iAny intelligent laborer is capable of doing the work as well as the best molder.

After the requisite ynumber of flask-frames have been filled with molds they vare to be matched in sets of two, a core having been first laid in the mold with its lends resting in `the prints made for it. Two oi" more sets .of

flasks may be stacked one above another, as seen atV Fig. 4, and supplied with top and bottomplates F F. These plates are then strained. toward each other by means of straining rods jor bars G, and thus securely confine the iiasks e are driven through key-seatsA fvmade inthe upper ends of thebars, whereby the top' and bottom plates are made to compress the molds',

L For conyenience in handlingI themolds "in, lthe operation of settingthem uprightin a pitv 'preparatory to pouring the metal to make theq pipe, one pair of the clamp-bars should be furnished with .'trunnions or holding-ears g, by which the trammels attached to fall of .the foundry-crane can raise the stack'of flasks.' The whole apparatus above describedzpos4 sess'es important advantagesover anydevic'es before to myknowledge employed lin the man-A ufacture tewhich it is adapted.' L 5 ".It has been theuniversal practice among foundrymen heretofore to mold the pipe withl out the use of Va match-plate, to set the moldy Y upright in the pit, and after dravvil'ig;1 the pat-,jv

tern to'insert thel core in its place. While this mode of operation is perhaps necessary ingthemanufacture ofthe larger sizes of: pipes, itis in@ convenient and unnecessarily exp'ensivein the manufacture of smaller sizes. The cores are liable to be bent inrhandlin g, and consequently.

`the pipe made thin upon one side. iThe? pro- 'cess is expensive, and -requires. the labor of vvthe best skilled workmen', v

My apparatus economizes ythejinan'ljifactur,

- both in the' time necessary to be expended and.

in the grade vofr'educated'labor` requiredk to d thework.-' -.v

What I claim to secure' by LettersPatent, is-- j manufacture of castfmetal pipes, which` consists ofthe combined molders bench andiiask-l l combination, substantallyas described.-

' l 2.' The improtred clamp 'for moldersasks consisting of the top and bottom plates F F and-the connecting-bars G, (one pair furnished V with trnnnions or holding-ears 'g) constructed arfldxcombine'd.substantially asidescribed` .A vFREDERIC FULLER.

Witnesses: v

EDWARD G. AMES, ,PETER RHUGHES,

asl my invention, and desire 

